<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>006-svg视口.html</title>
	<style>
		*{
			padding: 0;
			margin: 0;
		}
		svg{
			background-color: #sf220;
		}	
	</style>
</head>
<body>
	<svg height="500px" width="400px">
		<rect width="30" height="20">	
	</svg>
</body>	
</html>